Fabricated disk safekeeping device

ABSTRACT

Disclosed herein is a fabricated disk safekeeping device constructed in a structure in which a plurality of disk cases are stacked one on another in a multilayered fashion such that the disk cases are coupled with each other, whereby disk cases are easily added to or removed from the fabricated disk safekeeping device if necessary. The disk safekeeping device includes a plurality of disk cases stacked one on another in a multilayered fashion. The front part of each disk case is opened to form a disk insertion groove through which a disk can be inserted and ejected. Each disk case is provided at four corners of the upper part thereof with coupling protrusions. Each disk case is provided at four corners of the lower part thereof with coupling grooves. The disk cases are coupled with each other in the multilayered fashion by the insertion of the coupling protrusions into the corresponding coupling grooves.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a disk safekeeping device, and, moreparticularly, to a fabricated disk safekeeping device constructed in astructure in which a plurality of disk cases are stacked one on anotherin a multilayered fashion such that the disk cases are coupled with eachother, whereby the disk cases are easily added to or removed from thefabricated disk safekeeping device if necessary.

Also, the present invention relates to a fabricated disk safekeepingdevice including a top cover mounted to the top of the uppermost one ofthe stacked disk cases, the top cover having an illumination unitmounted therein, whereby it is possible to easily find disks using theillumination unit in a dark place and to provide an interior decorationeffect.

2. Description of the Related Art

Generally, compact disks (hereinafter, simply referred to as “disks”)are media for storing data, such as music, images, documents, andprograms. The disks have a small volume but a large capacity.Consequently, the disks have been increasingly used.

Disks are distributed while the disks are safely kept in predeterminedsafekeeping units. As the use of the disks distributed and kept safelyas described above has rapidly increased, a great demand for disksafekeeping devices is created. Various kinds of disk safekeepingdevices for safely keeping disks have been developed and used.

These disk safekeeping devices are constructed in a structure in which aplurality of receiving grooves are formed in a multilayered fashion suchthat disk cases, in which disks are safely kept, are inserted intopredetermined receiving spaces through the respective receiving grooves.Consequently, when a user wishes to withdraw a disk from a disksafekeeping device, the user pulls a disk case in which the disk issafely kept, and then opens the disk case to withdraw the disk from thedisk case. As a result, it is very inconvenient and troublesome towithdraw or insert disks from or into the disk safekeeping devices.

Furthermore, the number of the receiving grooves, through which the diskcases are inserted or withdrawn, of the conventional disk safekeepingdevices is fixed. As a result, it is not possible to safely keep thedisk cases in the conventional disk safekeeping devices in numberdesired by a user.

SUMMARY OF THE INVENTION

Therefore, the present invention has been made in view of the aboveproblems, and it is an object of the present invention to providefabricated disks safekeeping device constructed in a structure in whicha plurality of disk cases are stacked one on another in a multilayeredfashion such that the disk cases are coupled with each other, wherebydisk cases are easily added to or removed from the fabricated disksafekeeping device if necessary.

It is another object of the present invention to provide a fabricateddisk safekeeping device including a top cover mounted to the top of theuppermost one of the stacked disk cases, the top cover having anillumination unit mounted therein, whereby it is possible to easily finddisks using the illumination unit in a dark place and to provide aninterior decoration effect.

It is a further object of the present invention to provide a fabricateddisk safekeeping device constructed in a structure in whichinsertion-type disk cases filed and registered as a patent in the nameof the applicant of the present patent application are coupled with eachother in a multilayered fashion such that disks can be withdrawn andinserted horizontally.

In accordance with the present invention, the above and other objectscan be accomplished by the provision of a fabricated disk safekeepingdevice comprising a plurality of disk cases stacked one on another in amultilayered fashion, the front part of each disk case being opened toform a disk insertion groove through which a disk can be inserted andejected, each disk case being provided at four corners of the upper partthereof with coupling protrusions, each disk case being provided at fourcorners of the lower part thereof with coupling grooves, the disk casesbeing coupled with each other in the multilayered fashion by theinsertion of the coupling protrusions into the corresponding couplinggrooves, wherein each disk case is provided in a case body thereof withdisk ejection plates movable horizontally by the guidance of diskejection plate guide protrusions for pushing a disk forward such thatthe disk is ejected from the disk case, the disk ejection plates beingreturned to their original positions by a pulling force of restoringsprings, each disk case is further provided in the case body thereofwith locking plates for holding opposite sides of the disk, the diskejection plates and the locking plates being mounted at opposite sidesof each disk case, each disk ejection plate includes a disk pressingpart having a disk insertion groove formed at one end thereof oppositeto the disk, the disk pressing part pushing a corresponding side of therear part of the disk to push the disk forward, a handle part pushableby a hand of a user, and guide grooves, in which the disk ejection plateguide protrusions formed at each side of the case body are inserted, andeach locking plate includes a support part and a locking part formed inthe shape of a “V” toward the front of the case body about a fixing holeformed at one end thereof, in which a corresponding fixing protrusionformed at the case body is rotatably fitted, such that a rotation spaceis defined between the supporting part and the locking part, the lockingpart supporting a corresponding side of the disk by the elasticity ofthe supporting part when the locking part is rotated about the fixinghole, the locking part having a disk insertion groove formed in the endthereof opposite to the disk.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and other advantages of thepresent invention will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a perspective view illustrating a disk safekeeping deviceaccording to a preferred embodiment of the present invention;

FIG. 2 is an exploded perspective view of the disk safekeeping deviceaccording to the present invention;

FIG. 3 is an exploded perspective view illustrating a disk caseconstituting the disk safekeeping device according to the presentinvention;

FIG. 4 is a perspective view illustrating a disk inserted in the diskcase of the disk safekeeping device according to the present invention;

FIG. 5 is a perspective view illustrating a disk separated from the diskcase of the disk safekeeping device according to the present invention;

FIG. 6 is an enlarged view, in section, illustrating coupling betweenneighboring disk cases of, the disk safekeeping device according to thepresent invention;

FIG. 7 is an exploded perspective view illustrating a top coverconstituting the disk safekeeping device according to the presentinvention;

FIG. 8 is a sectional view of the top cover shown in FIG. 7;

FIG. 9 is an exploded perspective view illustrating a bottom cover and asupport constituting the disk safekeeping device according to thepresent invention; and

FIG. 10 is a sectional view of the bottom cover and the support shown inFIG. 9.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Now, a preferred embodiment of the present invention will be describedin detail with reference to the accompanying drawings.

FIG. 1 is a perspective view illustrating a disk safekeeping deviceaccording to a preferred embodiment of the present invention, FIG. 2 isan exploded perspective view of the disk safekeeping device according tothe present invention, FIG. 3 is an exploded perspective viewillustrating a disk case constituting the disk safekeeping deviceaccording to the present invention, FIG. 4 is a perspective viewillustrating a disk inserted in the disk case of the disk safekeepingdevice according to the present invention, FIG. 5 is a perspective viewillustrating a disk separated from the disk case of the disk safekeepingdevice according to the present invention, FIG. 6 is an enlarged view,in section, illustrating a coupling part of the disk case of the disksafekeeping device according to the present invention, FIG. 7 is anexploded perspective view illustrating a top cover constituting the disksafekeeping device according to the present invention, FIG. 8 is asectional view of the top cover shown in FIG. 7, FIG. 9 is an explodedperspective view illustrating a bottom cover and a support constitutingthe disk safekeeping device according to the present invention, and FIG.10 is a sectional view of the bottom cover and the support shown in FIG.9.

As shown in the drawings, the disk safekeeping device according to thepresent invention is constructed in a structure in which a plurality ofdisk cases 10 for receiving disks 100 are stacked one on another in amultilayered fashion such that the disk cases 10 are coupled with eachother.

Each disk case 10 is provided at upper and lower parts thereof withcoupling protrusions 11 and coupling grooves 11 a, respectively, bywhich the respective disk cases 10 are coupled with each other in amultilayered fashion.

As shown in FIGS. 1 to 10, the coupling protrusions 11 and the couplinggrooves 11 a are formed at four corners of each disk case 10. As shownin the drawings, the coupling protrusions 11 are formed at the upperpart of each disk case 10, and the coupling grooves 11 a are formed atthe lower part of each disk case 10. However, it is also possible toform the coupling protrusions 11 and the coupling grooves 11 a at thelower and upper parts of the respective disk cases 10, respectively.

The coupling between neighboring disk cases of the disk safekeepingdevice according to the present invention is shown in FIG. 6.

As shown in FIG. 6, the upper and lower disk cases 10 are coupled witheach other by the insertion of the coupling protrusions 11 into thecorresponding coupling grooves 11 a. When a plurality of disk cases 10are coupled with each other with the result that the height of thecoupled disk cases 10 is greater than the width of the coupled diskcases 10, the coupled disk cases 10 may be twisted or separated fromeach other due to a force applied to the coupled disk cases 10 from theside. In order to prevent the occurrence of this problem, therefore,fixing pins 50 are inserted through the respective disk cases 10 suchthat the coupled disk cases 10 can be securely fixed to each other.

As shown in FIG. 2, the fixing pins 50 may be formed in the shape of along bolt extending from the lowermost disk case 10 to the uppermostdisk case 10.

The disk cases 10 coupled with each other in a multilayered fashion havethe same structure. Each disk case 10 has disk ejection plates 3 foreasily ejecting the corresponding disk 100.

As shown in FIGS. 4 and 5, the disk ejection plates 3 serve to pushopposite sides of the rear part of the corresponding disk 100 forwardsuch that the corresponding disk 100 is ejected out of each disk case10.

Hereinafter, the construction of each disk case 10 having the diskejection plates 3 will be described in more detail.

The disk case 10 according to the present invention is very similar to adisk case registered as a patent in the name of the applicant of thepresent patent application.

The disk case 10 according to the present invention includes a case body1 and disk ejection plates 3 mounted in the case body 1.

As shown in FIG. 3, the case body 1 is constructed in a structure inwhich upper and lower jaws are formed at the edges of a plate bodyhaving a predetermined size, and a supporting unit for supporting a disk100 and another supporting unit for supporting the disk ejection plate 3are formed in the plate body. The front part of the case body 1 isopened to form a disk insertion groove 1 a through which the disk 100can be inserted and elected. The case body 1 is provided at oppositesides of the rear part thereof where the disk ejection plates 3 aremounted with one or more disk ejection plate guide protrusions 14 and15. The case body 1 is provided at opposite sides of the front partthereof with disk supporting protrusions 13 for supporting the bottom ofthe disk 100 such that the disk 100 is movable horizontally.

The disk ejection plate guide protrusions 14 and 15 are inserted inguide grooves 34 and 35 formed in the lower part of each disk ejectionplate 3 for supporting each disk ejection plate 3 such that each diskejection plate 3 is movable horizontally.

Each disk ejection plate 3 includes a disk pressing part 31 formed inthe shape of an arc such that the disk pressing part 31 is opposite tothe corresponding side of the rear part of the disk 100 and a handlepart 32 pushed by a hand of a user such that the disk pressing part 31is movable horizontally. Consequently, when the user pushes the handleparts 32 toward the center of the case body 1, the disk pressing parts31 move to the center of the case body 1. As a result, the disk pressingparts 31 push the opposite sides of the rear part of the disk 100, andtherefore, the disk 100 is ejected forward.

As shown in FIG. 3, a disk insertion groove 31 a is formed in eacharc-shaped disk pressing part 31, which is formed in the inside of thefront part of the disk ejection plate 3, such that the disk insertiongroove 31 a horizontally extends a predetermined length. Consequently,the disk 100 is stably supported by the disk insertion grooves 31 a.

After the disk ejection plates 3 with the above-stated construction arepushed toward the center of the case body 1 by the user, the diskejection plates 3 must be returned to their original positions, i.e.,the opposite edges of the case body 1. To this end, the disk case 10further includes restoring springs 4 for returning the disk ejectionplates 3 to their original positions.

The restoring springs 4 serve to pull the disk ejection plates 3 towardthe opposite sides of the case body 1. One end of each restoring spring4 is fixed to the case body 1, and the other end of each restoringspring 4 is fixed to the corresponding disk ejection plate 3.

In order to locate the restoring springs 4 for the returning the diskejection plates 3 to their original positions, a spring location groove33 is formed in the middle part of each disk ejection plate 3 such thatthe spring location groove 33 horizontally extends a predeterminedlength. Inside the spring location groove 33 is formed a spring fixingprotrusion 33 a.

In the disk case 10 constructed in a structure in which the disk 100 isejected by the disk ejection plates 3 as described above, when the casebody 1 of the disk case 10 tilts forward, the disk 100 received in thedisk case 10 is ejected out of the disk case 10 through the diskinsertion groove 1 a. As a result, the ejected disk 100 may collide withthe disk case 10 or other objects, whereby the disk 100 may be damaged.

In order to solve this problem, i.e., to prevent the ejection of thedisk without the operation of the disk ejection plates 3, the disk case10 may further include locking plates 2 for supporting the middle partor the front part of the disk 100.

As shown in FIG. 3, the locking plates 2 are mounted at the oppositesides of the case body 10 for pushing the opposite sides of the disk 100to support the disk 100.

Each locking plate 2 includes a locking part 22 rotatably fixed to acorresponding fixing protrusion 12 formed at the case body 1 at one endthereof for supporting one side of the disk 100 and a supporting part 21for elastically supporting the locking part 22.

The supporting part 21 and the locking part 22 are arranged such thatboth the supporting part 21 and the locking part 22 form a V-shape. Thatis, a rotation space 21 a is defined between the supporting part 21 andthe locking part 22. Consequently, when the locking parts 22 are rotatedabout fixing holes 2 a, in which the corresponding fixing protrusions 12are inserted, the supporting parts 21 elastically support thecorresponding locking parts 22. As a result, the locking parts 22support the opposite sides of the disk 100.

In the inside of each locking part 22, i.e., in the end of each lockingpart 22 opposite to the disk 100, a disk insertion groove 22 a having athickness greater than the thickness of the disk 100, as shown in FIG.3, such that one side of the disk can be stably supported by the diskinsertion groove 22 a.

Also, a label attachment part 1 b is formed at least one side of thecase body 1 constituting the disk case 10 such that a label showing thecontent of the disk 100 received in the disk case 10 can be attached tothe label attachment part 1 b. In addition, a sponge 16 is mounted inthe inner front part of the case body 1 for removing foreign matter fromthe surface of the disk 100.

The disk cases 10 with the above-stated construction are coupled witheach other by the insertion of the coupling protrusions 11 into thecorresponding coupling grooves 11 a. After the disk cases 10 are coupledin a multilayered fashion, a bottom cover 20 may be fixed to the bottomof the lowermost disk case 10, and a top cover 30 may be fixed to thetop of the uppermost disk case 10.

A disk safekeeping device may be constructed by only coupling therespective disk cases 10 in the multilayered fashion. In this case,however, the disk safekeeping device does not provide aestheticallypleasing external appearance. Furthermore, it is inconvenient to storethe disk safekeeping device. For this reason, the bottom cover 20 andthe top cover 30 are fixed to the bottom of the lowermost disk case 10and the top of the uppermost disk case 10, respectively.

The bottom cover 20 and the top cover 30 are formed in the same shape asof the disk case 10.

The top cover 30 is constructed in a three-layer structure, whereby thecoupling between the top cover 30 and the corresponding disk case 10 iseasily accomplished, and an illumination unit is mounted in the topcover 30.

Specifically, the top cover 30 includes an upper plate 310, a lowerplate 330, and a light transmission plate 320 interposed between theupper plate 310 and the lower plate 330.

The lower plate 330 is fixed to the uppermost disk case 10 among thedisk cases coupled with each, other in a multilayered fashion. While theupper plate 310 and the light transmission plate 320 are coupled witheach other, catching protrusions 322 formed at the lower part of thelight transmission plate 320 are caught by the edges of the lower plate330.

As shown in FIG. 7, the upper plate 310 has a circuit board 30 d and abattery 30 b mounted therein. In the upper plate 310 is also mounted abutton 30 c for allowing a user to push a switch disposed in the circuitboard 30 d.

As shown in FIGS. 7 and 8, the upper plate 310 is also provided at fourcorners thereof with fixing protrusions 311, which are coupled with thelight transmission plate 320, such that fixing screws penetrating thelight transmission plate 320 are securely fixed in the correspondingfixing protrusions 311.

The light transmission plate 320 is made of transparent synthetic resinor glass. As shown in FIG. 7, the light transmission plate 320 is formedin the shape of a loop. The light transmission plate 320 is providedalong the inside edge of the upper part thereof with a reinforcing wing323, which extends toward the inside of the light transmission plate320. In the reinforcing wing 323 are formed a plurality of lamp fixinggrooves 324.

In the lamp fixing grooves 324 are securely inserted lamps 30 a,respectively. The lamps 30 a are connected to the circuit board 30 dmounted in the upper plate 310 for emitting light when the lamps 30 aare energized by the battery 30 b or another commercial power supply.

Preferably, the lamps 30 a are mounted at the front of the disk case 10and the right and left sides of the disk case 10 at least, as shown inFIG. 7.

As shown in FIG. 7, the catching protrusions 322 are formed at the lowerpart of the light transmission plate 320. Each catching protrusion 322has a jaw formed at the lower end thereof. Consequently, as shown inFIG. 8, the jaws formed at the lower ends of the catching protrusions322 are caught by the lower part of the lower plate 330 with the resultthat the light transmission plate 320 is fixed to the lower plate 330.

As shown in FIG. 7, a plurality of fixing holes 332 are formed throughthe lower plate 330 such that the catching protrusions 322 formed at thelower part of the light transmission plate 320 inserted through thecorresponding fixing holes 332. At the corners of the lower plate 330are formed fixing protrusions 331, by which the lower plate 330 is fixedto the uppermost disk case 10.

At the lower part of the bottom cover 20 fixed to the lowermost diskcase 10 is further mounted a support 40 for rotatably supporting thebottom cover 20.

In order to further mount the support 40, the bottom cover 20 isprovided at the center thereof with a support coupling groove 210 whichis bent upward in the shape of a circle. The support 40 is provided witha coupling protrusion 410 which is formed in the shape of a circle suchthat the coupling protrusion 410 corresponds to the support couplinggroove 210 formed at the bottom cover 20.

As shown in FIG. 9, the support coupling groove 210 formed at the bottomcover 20 is formed in the shape of a circular groove when viewing fromthe bottom thereof, and the coupling protrusion 410 formed at thesupport 40 is formed in the shape of a circular protrusion when viewingfrom the top thereof. Consequently, the support 40 is coupled with thebottom cover 20 while the coupling protrusion 410 is fitted in thesupport coupling groove 210, and therefore, the bottom cover 20 isrotatably supported by the support 40.

When the bottom cover 20 is lifted upward while the coupling protrusion410 is fitted in the support coupling groove 210, the support 40 isseparated from the bottom cover 20. In order to prevent the separationof the support 40 from the bottom cover 20, therefore, a catchingprotrusion 211 is formed at the inner end of the support coupling groove210 formed along the bottom cover 20 such that the catching protrusion211 extends downward and is then bent outward, and a catching jaw 411 isformed along the inner end of the coupling protrusion 410 such that thecatching protrusion 211 can be caught by the catching jaw 411.

As the support coupling groove 210 is brought into surface contact withthe coupling protrusion 410 as described above, however, the frictionalforce between the support coupling groove 210 and the couplingprotrusion 410 increases with the result that the bottom cover 20 is notsmoothly rotated relative to the support 40. In order to accomplishsmoother rotation of the bottom cover 20 relative to the support 40,therefore, a plurality of balls 420 are further mounted between thesupport coupling groove 210 and the coupling protrusion 410.

In order to further mount the balls 420, a plurality of ball locationgrooves 412, in which the balls 420 are located, are formed in the topof the coupling protrusion 410 of the support 40, and a rail groove 212is formed along the inside of the support coupling groove 210 formed atthe bottom cover 20.

The balls 420 located in the respective ball location grooves 412 formedin the coupling protrusion 410 rotate in the respective ball locationgrooves 412, and the rail groove 212 positioned on the balls 410 ismoved by the rotation of the balls 410, whereby the bottom cover issmoothly rotated relative to the support 40.

The support 40 with the above-stated construction is made of syntheticresin or iron. Consequently, when the support 40 is placed on a roomfloor or a piece of furniture, such as a table, the support 40 may slideor damage the room floor or the furniture.

In order to prevent the support 40 from sliding or damaging the roomfloor or the furniture, therefore, a plurality of shock-absorbingmembers 430 may be attached to the bottom of the support 40 as shown inFIGS. 9 and 10.

The shock-absorbing members 430 serve to isolate the bottom of thesupport 40 from the room floor or the surface of the furniture and toproduce friction between the shock-absorbing members 430 and the roomfloor or the surface of the furniture. The shock-absorbing members 430are made of rubber or soft synthetic resin. As shown in FIGS. 9 and 10,the support 40 is provided at the bottom thereof with a plurality offixing grooves in which the corresponding shock-absorbing members 430are securely fixed; however, the shock-absorbing members 430 may beattached to the edge of the support 40 or throughout the bottom of thesupport 40.

At the top of each disk case 10 constituting the disk safekeeping devicewith the above-stated construction may be further mounted a cover plate5 as shown in FIG. 3.

The cover plate 5 serves to prevent the disk ejection plates 3 and thelocking plates 2 mounted in the case body 1 of the disk case 10 frombeing separated from the case body 1 of the disk case 10. Consequently,the cover plate 5 may be omitted when a pressing unit for pressing thedisk ejection plates 3 and the locking plates 2 is provided at thebottom of the case body 1.

As shown in FIG. 3, the cover plate 5 is provided at the lower partthereof with a plurality of case body coupling protrusions 58. Each casebody coupling protrusion 58 has a jaw formed at the lower end thereof.The jaws of the case body coupling protrusions 58 are caught by thelower part of the case body 1 through cover plate coupling holes 18formed at the edge of the case body 1, whereby the cover plate 5 isfixed to the case body 1.

The case body 1 of each disk case 10 constituting the disk safekeepingdevice with the above-stated construction may be made of a transparentmaterial, such as transparent synthetic resin. When the case body 1 ofeach disk case 10 is made of the transparent material, light emittedfrom the lamps 30 a mounted in the top cover 30 is illuminated from theuppermost disk case 10 to the lowermost disk case 10, whereby aninterior decoration effect is obtained.

As apparent from the above description, the fabricated disk safekeepingdevice according to the present invention is constructed in a structurein which a plurality of disk cases are stacked one on another in amultilayered fashion such that the disk cases are coupled with eachother. Consequently, the present invention has the effect of easilyadjusting the number of disks safely kept in the fabricated disksafekeeping device.

Also, each disk case according to the present invention includes diskejection plates for easily ejecting a disk. Consequently, the presentinvention has the effect of easily ejecting a disk safely kept in eachdisk case by the operation of the disk ejection plates. In addition,each disk case according to the present invention includes lockingplates for supporting a disk. Consequently, the present invention hasthe effect of preventing a disk from being caught by a portion of eachdisk case and thus being damaged.

Also, the fabricated disk safekeeping device according to the presentinvention is constructed in a structure in which a plurality of diskcases, stacked one on another in a multilayered fashion, are mounted ona support such that the stacked disk cases can be rotated relative tothe support. Consequently, the present invention has the effect ofeasily adjusting a disk withdrawal direction in which disks safely keptin the disk cases are withdrawn. In addition, a top cover is fixed tothe uppermost disk case, and an illumination unit is mounted in the topcover. Consequently, the present invention has the effect of a usereasily finding and withdrawing disks using the illumination unit in adark place.

Furthermore, each disk case is made of a transparent material such thatlight emitted from the illumination unit is illuminated from theuppermost disk case to the lowermost disk case. Consequently, thepresent invention has the effect of providing an interior decorationeffect.

Although the preferred embodiment of the present invention has beendisclosed for illustrative purposes, those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the inventionas disclosed in the accompanying claims.

1. A fabricated disk safekeeping device comprising: a plurality of diskcases stacked one on another in a multilayered fashion, the front partof each disk case being opened to form a disk insertion groove throughwhich a disk can be inserted and ejected, each disk case being providedat four corners of the upper part thereof with coupling protrusions,each disk case being provided at four corners of the lower part thereofwith coupling grooves, the disk cases being coupled with each other inthe multilayered fashion by the insertion of the coupling protrusionsinto the corresponding coupling grooves, wherein each disk case isprovided in a case body thereof with disk ejection plates movablehorizontally by the guidance of disk ejection plate guide protrusionsfor pushing a disk forward such that the disk is ejected from the diskcase, the disk ejection plates being returned to their originalpositions by a pulling force of restoring springs, each disk case isfurther provided in the case body thereof with locking plates forholding opposite sides of the disk, the disk ejection plates and thelocking plates being mounted at opposite sides of each disk case, eachdisk ejection plate includes a disk pressing part having a diskinsertion groove formed at one end thereof opposite to the disk, thedisk pressing part pushing a corresponding side of the rear part of thedisk to push the disk forward, a handle part pushable by a hand of auser, and guide grooves, in which the disk ejection plate guideprotrusions formed at each side of the case body are inserted, and eachlocking plate includes a support part and a locking part formed in theshape of a “V” toward the front of the case body about a fixing holeformed at one end thereof, in which a corresponding fixing protrusionformed at the case body is rotatably fitted, such that a rotation spaceis defined between the supporting part and the locking part, the lockingpart supporting a corresponding side of the disk by the elasticity ofthe supporting part when the locking part is rotated about the fixinghole, the locking part having a disk insertion groove formed in the endthereof opposite to the disk.
 2. The disk safekeeping device accordingto claim 1, further comprising: a bottom cover mounted to the bottom ofthe lowermost one of the stacked disk cases; and a top cover mounted tothe top of the uppermost one of the stacked disk cases.
 3. The disksafekeeping device according to claim 2, wherein the top cover includesan upper plate having a circuit board and a button mounted therein, thebutton being directed outward, a light transmission plate having aplurality of fixing holes, through which screws are inserted into theupper plate, a plurality of lamp fixing grooves, in which a plurality oflamps are fixed, respectively, the fixing holes and the lamp fixinggrooves being formed in the upper part of the light transmission plate,and a plurality of catching protrusions formed at the lower partthereof, the light transmission plate being made of a transparent orsemitransparent material such that light emitted from the lamps isirradiated to the side, and a lower plate having a plurality of fixingholes, through which the catching protrusions formed at the lower partof the light transmission plate are inserted, the lower plate beingfixed to the uppermost one of the stacked disk cases.
 4. The disksafekeeping device according to claim 2, further comprising: a supportmounted at the lower part of the bottom cover for rotatably supportingthe bottom cover, wherein the bottom cover is provided with a supportcoupling groove which is bent upward in the shape of a circle, thesupporting coupling groove having a rail groove formed in the insidethereof and a catching protrusion formed at the inner lower end thereof,and the support is provided with a coupling protrusion formed in theshape of a circle such that the coupling protrusion corresponds to thesupport coupling groove formed at the bottom cover, the circularcoupling protrusion having a plurality of hemispherical ball locationgrooves, in which balls are located, formed in the top thereof and acatching jaw formed along the inner end thereof such that the catchingprotrusion formed at the lower end of the bottom cover can be caught bythe catching jaw.
 5. The disk safekeeping device according to claim 4,further comprising: a plurality of shock-absorbing members mounted tothe bottom of the support for preventing the support from sliding. 6.The disk safekeeping device according to claim 5, further comprising: asponge mounted in the inner front part of the case body of each diskcase for removing foreign matter from the surface of the disk.
 7. Thedisk safekeeping device according to claim 6, wherein each disk case isprovided at the top of the case body thereof with a cover plate, thecover plate having a plurality of case body coupling protrusions formedat four corners of the lower part thereof such that the case bodycoupling protrusions are inserted into a plurality of cover platecoupling holes formed in the case body, whereby the cover plate isdetachably coupled to the case body.
 8. The disk safekeeping deviceaccording to claim 7, wherein each of the coupling protrusions formed atthe case body of each disk case is provided at the center thereof with apin through-hole, through which a corresponding fixing pin is inserted.9. The disk safekeeping device according to claim 8, wherein each diskcase is provided at least one side of the case body thereof with a labelattachment part.
 10. The disk safekeeping device according to claim 9,wherein the case body of each disk case is made of transparent syntheticresin.
 11. The disk safekeeping device according to claim 3, furthercomprising: a support mounted at the lower part of the bottom cover forrotatably supporting the bottom cover, wherein the bottom cover isprovided with a support coupling groove which is bent upward in theshape of a circle, the supporting coupling groove having a rail grooveformed in the inside thereof and a catching protrusion formed at theinner lower end thereof, and the support is provided with a couplingprotrusion formed in the shape of a circle such that the couplingprotrusion corresponds to the support coupling groove formed at thebottom cover, the circular coupling protrusion having a plurality ofhemispherical ball location grooves, in which balls are located, formedin the top thereof and a catching jaw formed along the inner end thereofsuch that the catching protrusion formed at the lower end of the bottomcover can be caught by the catching jaw.
 12. The disk safekeeping deviceaccording to claim 11, further comprising: a plurality ofshock-absorbing members mounted to the bottom of the support forpreventing the support from sliding.
 13. The disk safekeeping deviceaccording to claim 12, further comprising: a sponge mounted in the innerfront part of the case body of each disk case for removing foreignmatter from the surface of the disk.
 14. The disk safekeeping deviceaccording to claim 13, wherein each disk case is provided at the top ofthe case body thereof with a cover plate, the cover plate having aplurality of case body coupling protrusions formed at four corners ofthe lower part thereof such that the case body coupling protrusions areinserted into a plurality of cover plate coupling holes formed in thecase body, whereby the cover plate is detachably coupled to the casebody.
 15. The disk safekeeping device according to claim 14, whereineach of the coupling protrusions formed at the case body of each diskcase is provided at the center thereof with a pin through-hole, throughwhich a corresponding fixing pin is inserted.
 16. The disk safekeepingdevice according to claim 15, wherein each disk case is provided atleast one side of the case body thereof with a label attachment part.17. The disk safekeeping device according to claim 16, wherein the casebody of each disk case is made of transparent synthetic resin.